This is a legacy version of the WELL Building Standard. Please check the latest version here.

Advanced air purification

Some circumstances justify greater investment in air purification strategies. For example, proximity to highly traveled roads and seasonal variation can affect outdoor air quality, increasing ozone and VOC levels. Additionally, wet climates tend to have high levels of airborne mold.

This feature requires the use of carbon filters to remove VOCs and ozone, and ultraviolet sanitizers to irradiate any bacteria, viruses and mold spores present in circulating indoor air.

Part 1: Carbon Filtration

To reduce VOCs in the indoor air, buildings which recirculate air use one of the following methods:

a. Activated carbon filters in the main air ducts to filter recirculated air. Replacement is required as recommended by the manufacturer.
b. A standalone air purifier with a carbon filter used in all regularly occupied spaces. Purifiers must be sized appropriately to the spaces they are serving. Filter replacement is required as recommended by the manufacturer.
Part 1: Quarterly Testing

Water from all kitchen faucets and drinking fountains is tested quarterly (with reports submitted annually to the IWBI) for the presence of the following dissolved metals or metalloids:

a.53 Lead.
b.53 Arsenic.
c.53 Mercury.
d.53 Nickel.
e. Copper.
Part 3: Air Quality Maintenance

As evidence that the selected filtration/sanitation system chosen continues to be fully operational, projects must annually provide IWBI with:

a. Records of air filtration/sanitization maintenance, including evidence that the filter and/or sanitizer has been properly maintained as per the manufacturer's recommendations.
Cardiovascular
Immune
Respiratory

Applicability Matrix

Core & Shell Tenant Improvement New Construction
Part 1: Quarterly Testing - O O
Part 1: Carbon Filtration O O O
Part 3: Air Quality Maintenance O O O
Commercial Kitchen Schools Multifamily Residential Restaurant Retail
Part 1: Carbon Filtration O O O O O
Part 1: Quarterly Testing O O O O O
Part 3: Air Quality Maintenance O O O O O

Verification Methods Matrix

Letters of Assurance Annotated Documents On-Site Checks
PART 1 (Design)
Carbon Filtration
MEP Spot Check
PART 1 (Protocol)
Quarterly Testing
Operations Schedule
PART 3 (Protocol)
Air Quality Maintenance
Operations Schedule
15

U.S. Environmental Protection Agency. Residential Air Cleaners: A Summary of Available Information. Washington, DC: U.S. Environmental Protection Agency; August 2009.

23.2.a

The EPA's "Residential Air Cleaners" notes that properly designed UVGI cleaners in typical airstream disinfection applications could reduce the viability of vegetative bacteria and molds, and could provide low to moderate reduction in viruses.

23.2.b

The EPA's Residential Air Cleaners document notes that photocatalytic oxidation cleaners are intended to change gaseous pollutants and associated odors into harmless products.